package com.nowcoder.community.controller;

import com.nowcoder.community.entity.*;
import com.nowcoder.community.event.EventProducer;
import com.nowcoder.community.service.CommentService;
import com.nowcoder.community.service.DiscussPostService;
import com.nowcoder.community.service.LikeService;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.HostHolder;
import com.nowcoder.community.util.RedisKeyUtil;
import org.apache.ibatis.io.ResolverUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.*;

@Controller
@RequestMapping(path = "/discuss")
public class DiscussPostController implements CommunityConstant {
    @Autowired
    private DiscussPostService discussPostService;
    @Autowired
    private HostHolder hostHolder;
    @Autowired
    private UserService userService;
    @Autowired
    private CommentService commentService;
    @Autowired
    private LikeService likeService;
    @Autowired
    private EventProducer eventProducer;
    @Autowired
    private RedisTemplate redisTemplate;


    @RequestMapping(path = "/add",method = RequestMethod.POST)
    @ResponseBody
    public String addDiscussPost(String title,String content) {
        User user = hostHolder.getUser();
        if (user == null) {
            return CommunityUtil.getJSONString(403, "你还没有登陆哦！");
        }
        if (title.isBlank() || content.isBlank()) {
            return CommunityUtil.getJSONString(403, "帖子主题与内容不能为空哦QAQ");
        } else {


            DiscussPost post = new DiscussPost();
            post.setUserId(user.getId());
            post.setTitle(title);
            post.setContent(content);
            post.setCreateTime(new Date());
            discussPostService.addDiscussPost(post);

            //触发发帖事件
            Event event = new Event()
                    .setTopic(TOPIC_PUBLISH)
                    .setUserId(user.getId())
                    .setEntityId(ENTITY_TYPE_POST)
                    .setEntityId(post.getId());
            eventProducer.fireEvent(event);

            //计算帖子分数
            String redisKey = RedisKeyUtil.getPostScoreKey();
            redisTemplate.opsForSet().add(redisKey,post.getId());

            //出现报错，以后统一处理
            return CommunityUtil.getJSONString(0, "发布成功！");


        }
    }
    /**
     * 帖子详情查询返回
     * @param discussPostId
     * @param model
     * @return
     */
    @RequestMapping(path = "/detail/{discussPostId}",method = RequestMethod.GET)
    public String getDiscussPost(@PathVariable("discussPostId") int discussPostId, Model model, Page page){
        //帖子
        DiscussPost post = discussPostService.findDiscussPostById(discussPostId);
        model.addAttribute("post",post);
        //帖子作者
        User user = userService.findUserById(post.getUserId());
        model.addAttribute("user",user);

        //帖子的点赞
        long likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_POST, discussPostId);
        model.addAttribute("likeCount",likeCount);
        //点赞状态
        int likeStatus = hostHolder.getUser() == null ? 0 :
                likeService.findEntityLikeStatus(hostHolder.getUser().getId(), ENTITY_TYPE_POST, discussPostId);
        model.addAttribute("likeStatus",likeStatus);

        //评论的分页信息
        page.setLimit(5);
        page.setPath("/discuss/detail/"+discussPostId);
        page.setRows(post.getCommentCount());
        //评论 给帖子的评论
        //回复：给评论的评论

        //评论列表  分页
        List<Comment> commentList = commentService.findCommentsByEntity(
                ENTITY_TYPE_POST, post.getId(), page.getOffset(), page.getLimit());
        //评论vo列表
        List<Map<String,Object>> commentVoList = new ArrayList<>();
        if (commentList != null){
            for (Comment comment: commentList
                 ) {
                //一个评论的vo
                Map<String,Object> commentVo = new HashMap<>();
                //添加评论
                commentVo.put("comment",comment);
                //添加评论作者
                commentVo.put("user",userService.findUserById(comment.getUserId()));
                //评论的点赞
                //点赞数量
                likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT, comment.getId());
                commentVo.put("likeCount",likeCount);
                //点赞状态
                likeStatus = hostHolder.getUser() == null ? 0 :
                        likeService.findEntityLikeStatus(hostHolder.getUser().getId(), ENTITY_TYPE_COMMENT, comment.getId());
                commentVo.put("likeStatus",likeStatus);

                //回复列表 不分页
                List<Comment> replyList = commentService.findCommentsByEntity(
                        ENTITY_TYPE_COMMENT, comment.getId(), 0, Integer.MAX_VALUE);

                //回复vo列表
                List<Map<String,Object>> replyVoList = new ArrayList<>();
                if (replyList != null){
                    for (Comment reply:replyList
                         ) {
                        Map<String,Object> replyVo = new HashMap<>();
                        //回复
                        replyVo.put("reply",reply);
                        //回复作者
                        replyVo.put("user",userService.findUserById(reply.getUserId()));
                        //回复目标 若回复目标0返回空值  有回复目标返回目标用户user
                      User taget= reply.getTargetId() == 0 ? null : userService.findUserById(reply.getTargetId());
                      replyVo.put("target",taget);
                      //回复的点赞
                        //点赞数量
                        likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT, reply.getId());
                        replyVo.put("likeCount",likeCount);
                        //点赞状态
                        likeStatus = hostHolder.getUser() == null ? 0 :
                                likeService.findEntityLikeStatus(hostHolder.getUser().getId(), ENTITY_TYPE_COMMENT, reply.getId());
                        replyVo.put("likeStatus",likeStatus);

                      replyVoList.add(replyVo);
                    }
                }
                commentVo.put("replys",replyVoList);

                //回复数量
                int replyCount = commentService.findCommentCount(ENTITY_TYPE_COMMENT, comment.getId());
                commentVo.put("replyCount",replyCount);

                commentVoList.add(commentVo);


            }

        }

        model.addAttribute("comments",commentVoList);

        return "/site/discuss-detail";

    }

    //置顶
    @RequestMapping(path = "/top",method = RequestMethod.POST)
    @ResponseBody
    public String setTop(int id){
        discussPostService.updateType(id,1);
        //触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(hostHolder.getUser().getId())
                .setEntityId(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);
        return CommunityUtil.getJSONString(0,"置顶成功");
    }

    //加精
    @RequestMapping(path = "/wonderful",method = RequestMethod.POST)
    @ResponseBody
    public String setWonderful(int id){
        discussPostService.updateStatus(id,1);
        //触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(hostHolder.getUser().getId())
                .setEntityId(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);

        //计算帖子分数
        String redisKey = RedisKeyUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(redisKey,id);
        return CommunityUtil.getJSONString(0,"加精成功");
    }

    //删除

    @RequestMapping(path = "/delete",method = RequestMethod.POST)
    @ResponseBody
    public String setDelete(int id){
        discussPostService.updateStatus(id,2);
        //触发删帖事件
        Event event = new Event()
                .setTopic(TOPIC_DELETE)
                .setUserId(hostHolder.getUser().getId())
                .setEntityId(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);
        return CommunityUtil.getJSONString(0,"置顶成功");
    }
}
